From 7dd00083b1160b560fa2a0a486799b57baa5d035 Mon Sep 17 00:00:00 2001 From: Bartlomiej Zolnierkiewicz Date: Fri, 20 Jul 2007 01:11:56 +0200 Subject: ide: add ide_pio_cycle_time() helper (take 2) * Add ide_pio_cycle_time() helper. * Use it in ali14xx/ht6560b/qd65xx/cmd64{0,x}/sl82c105 and pmac host drivers (previously cycle time given by the device was only used for "pio" == 255). * Remove no longer needed ide_pio_data_t.cycle_time field. v2: * Fix "ata_" prefix (Noticed by Jeff). Acked-by: Sergei Shtylyov Cc: Jeff Garzik Signed-off-by: Bartlomiej Zolnierkiewicz --- drivers/ide/ide-lib.c | 40 ++++++++++++++++++++++++++++------------ 1 file changed, 28 insertions(+), 12 deletions(-) (limited to 'drivers/ide/ide-lib.c') diff --git a/drivers/ide/ide-lib.c b/drivers/ide/ide-lib.c index d5cc96bb429..6e85bee0bef 100644 --- a/drivers/ide/ide-lib.c +++ b/drivers/ide/ide-lib.c @@ -249,6 +249,29 @@ static int ide_scan_pio_blacklist (char *model) return -1; } +unsigned int ide_pio_cycle_time(ide_drive_t *drive, u8 pio) +{ + struct hd_driveid *id = drive->id; + int cycle_time = 0; + + if (id->field_valid & 2) { + if (id->capability & 8) + cycle_time = id->eide_pio_iordy; + else + cycle_time = id->eide_pio; + } + + /* conservative "downgrade" for all pre-ATA2 drives */ + if (pio < 3) { + if (cycle_time && cycle_time < ide_pio_timings[pio].cycle_time) + cycle_time = 0; /* use standard timing */ + } + + return cycle_time ? cycle_time : ide_pio_timings[pio].cycle_time; +} + +EXPORT_SYMBOL_GPL(ide_pio_cycle_time); + /** * ide_get_best_pio_mode - get PIO mode from drive * @drive: drive to consider @@ -266,7 +289,6 @@ static int ide_scan_pio_blacklist (char *model) u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode, ide_pio_data_t *d) { int pio_mode; - int cycle_time = 0; struct hd_driveid* id = drive->id; int overridden = 0; @@ -284,7 +306,6 @@ u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode, ide_p } if (id->field_valid & 2) { /* drive implements ATA2? */ if (id->capability & 8) { /* IORDY supported? */ - cycle_time = id->eide_pio_iordy; if (id->eide_pio_modes & 7) { overridden = 0; if (id->eide_pio_modes & 4) @@ -294,8 +315,6 @@ u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode, ide_p else pio_mode = 3; } - } else { - cycle_time = id->eide_pio; } } @@ -310,18 +329,15 @@ u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode, ide_p pio_mode--; printk(KERN_INFO "%s: applying conservative " "PIO \"downgrade\"\n", drive->name); - if (cycle_time && cycle_time < ide_pio_timings[pio_mode].cycle_time) - cycle_time = 0; /* use standard timing */ } } - if (pio_mode > max_mode) { + + if (pio_mode > max_mode) pio_mode = max_mode; - cycle_time = 0; - } - if (d) { + + if (d) d->pio_mode = pio_mode; - d->cycle_time = cycle_time ? cycle_time : ide_pio_timings[pio_mode].cycle_time; - } + return pio_mode; } -- cgit v1.2.3